<!DOCTYPE html>
<html>
    <head>
        <title>
            提问
        </title>
    </head>
    <body>
      <form method="POST" action="/ask">
        <front style = "color:red">{{error}}</front>
        <input type="text" name="question" placeholder="你的问题">
        <button type="submit">提交</button>
      </form>
    </body>
</html>